'Momentum' is a dormant tetraploid introduced in 1996 by Emily Olson. More information about Emily Olson's introductions can be found on her website that was last updated in 2011: http://www.ctdaylily.com/Olson...

Momentum is a mid-season bloomer. It has earned the Honorable Mention: 2002 AHS award. It is both pod and pollen fertile with 88 registered children: http://garden.org/plants/paren...